Gas-regulating valve



July 31, 1923- WITNESSES jl fzif L. E.. TRQSCLAIR GAS REGULAT I NG VALVEFiled Jan. 21. 1922 LEO E UG ENE TROSCLAI D m/vmmn' ATTORNEYS PatentedJuly 31, 1923.

UNITED STATES PAT LEO EUGENE TROSCLAIR, or unwonnn nnspno'ers'rfiiiilleas-aneumrrne 'vALvn. Y

Application filed January 21, 1922. serial'ii'b. 530,981.

To all whom it may concern."

Be it known that .1. Leo EUGENE Tnos- CLAIR, a citizen of-the UnitedStates and a residen of New Orleans,-in the parish of Orleans and Stateof Louisiana, have ;i.uvented certain new and useful Improvemerits inGas Regulating Values, of which the following is a specification.

y invention relates to improvements i111 valves, and it consists in theconstructions, combinations and mode of operation herein described andclaimed. 1 i

An object of the-invention is to provide a valve which is operated byvarying pressures of steam in a boiler to autoinati: ally diminish orincrease the flow of gas. but at the same time prevent the flow of .gasto a burner from being entirely stopped. this last provision functioninglike a pilot.

Other objects and advantages will appear in the following specification.reference being had to the accompanying drawings, in which-- The figureis a longitudinal improved valve.

This valve is an improvement on my patent for gas regulating valves,1,407,963 of February 28, 1922. A description of the old constructionwill serve to emphasize the improvement. A pipe 1 conducts gas to thecasing 2 of a valve head 3, and from the casing flows to a gas burner byway of the pipe 4. The burner may be of any desired type. Its purpose isto heat the water in a boiler.

Steam from this boiler enters the left side of the casing 2 by way of apipe 5 so that its pressure is exerted against a flexible diaphragm 6.The diaphragm is clamped between sections of the casing 2 dividing theeasing into high and low pres sure compartments. The head of the valve 3in the low pressure compartment engages the right side of the diaphragm.A spring 7 presses the valve in this engagement. The spring bearsagainst a screw plug 8 in the threaded end of the barrel 9 of the casing2. The patent referred to will disclose the use of an adjustable by-passbetween the casing 2 and the barrel 9. This by-pass is dispensed with,but its function is retained and the construction of the improvement bywhich this function is retained, constitutes the invention. The left endof the barrel 9 is shaped into a valve seat 10 which is beveled, asshown, instead of being flat section of the E TQY F C asin the copendingapplication: Theinzier surface of the head 3 ..is correspondinglybeveled at 11., A guide. 12 in thebore-of. the barrelfi supports thevalve 11.. and its associated part-s. There are times when it may bedesired to have the bevel ll rest on the seat 21d. Ther are other t mes;whea thisimay. notibe desirable,- and provisions aremadeto meet bothinstances, The, valve body is internally .threaded at 13 -llJSuulldIlgth 'i A stem 14 isscrewed into the threadedibore 13 so that theleft end of the; stem engages the diaphragm 6. The purposeofthisarrangement is, topermit an adjustment after the valve 11 has beenground and obviously the stem M.- must be adjusted in respect to thediaphragm .6 in. order to compensate for the material ground ,away fromthat-ace of the valvew The stem 14 theretore always bears a fixedrelationship to the diaphragm 6, while the valve head 3 varies inposition in respect to the diaphragm 6 as it is ground away. A check nut15 fixes the stem 14 in its newly adjusted ositions.

A screw 16 limits the movement of the valve 3 toward the right under thepressure of steam at the left of the diaphragm 6. The adjustments of thescrew 16 in the plug 8 are fixed by a check nut 17. If the screw 16 isadjusted in far enough, the valve 3 will be prevented from seating at10, and therefore a passage from the pipe 1 to the pipe 4, hence to theburner, is left open. This open passage functions as a. pilot for theburner when most of the as is cut oil and steam in the boiler is un erhigh pressure. The function of the pilot may be disposed with by simplyadjusting the screw 16 out so that the surfaces 11 and 10 may contactunder high steam pressure, at which time care must be taken to cut offthe How of gas at the cock 18.

I claim 1. A gas casing including a barrel ending in a seat, a valveassociated with the seat, a valve body of which said valve is a partsituated in the barrel, a stem adjustable in the valve body tocompensate for grindings of the valve, a plug in the end of the barrelopposite the seat, and a set screw in said plug to cooperate with theend of said stem.

2. The combination of a gas casing having a diaphragm receiving steampressure at one gidg, a hagglinclnded in the casing and hving a sehtyavalve engaging the diaphragm but also adapted to engage the seat, a stemcarried by the'valve, a plug in the end of the barrel, a spring restinagainst the plug pressing the valve toward the diaphragm, a set screw inthe plug to he engaged by the stem'to lfinit' the movement'of the "alvetoward the seat, and meanspermitting adjustments of the stem inthe valveto compensate for grindings bi the"valve when'the adjnstments of thescrew are such that the valve repeatedly engages the seat. 'i V V Thecombination of a valve seat, a valve adapted to engage the seat, anadjacent diaphragm adapted to move the valve toward the seat, and a stemupon which the valveis adjustable extendingthrough the valve intoengagement with the diaphragm to preserve a fixed relationship betweenthe stem and diaphragm to ermit grindings of the valve andpreventinterference with the 'functi'gining 0f the diaphragm.

4. The combination of a valve seat, a valve which is movable in respectto the seat, means which is adapted to' remain stationary in respect tothe valve seat and thus constitute an abutment, means 'which is carriedby the valve and is adapted to enage the abutment so as to check theseating movement of the valve and leave a bypass, and means by which thevalve may be adjusted upon said carried means so as to change therelationship of the valve to the seat.

5. The combination of a valve seat, a diaphragm situated in front of thevalve seat and adapted to move in respect thereto, a stem contacting thediaphragm at one end, means which provides an abutment with which theother end of the stem is adapted to contact, a valve carried by thestem, means by which stem is kept in permanent contact with thediaphragm and by which the valve is kept from the seat, and means on thestem by which the valve may he adjusted thereon in respect to the seat,stem and diaphragm.

6. The combination of a barrel having a valve seat, a valve adapted toengage the seat, abuttable means carried by the barrel adapted to checkthe seating movement of the valve to leave a by-pass, means carried bythe valve adapted to table means, and means on said valve-carried meansenabling adjustment thereof in respect to said abuttable means tocompensate for a rinding of the valve surface.

L O EUGENE TROSCLAIR.

engage said abutthe first end of the i

